Bring down the price to $100-150 and lose the current DRM model, and I'd buy one. I don't mind reading on a screen, and these screens are supposed to have such a high contrast ratio that it's almost as good as reading a printed page.
Personally, I'd like to be able to download the ebook to my computer, then upload them to the Kindle so I could keep backups. Also, $9.99 for an ebook is a bit ridiculous, particularly when you can usually buy the actual book for less.